#include <iostream>
#include <vector>
#include <tuple>


using namespace std;


int main() {
    vector<tuple<int, int>> vec;
    vector<tuple<int, int>>::iterator it;

    for (int i = 1; i <= 5; i++) vec.push_back(make_tuple(i, i * 10));

    it = vec.begin() + 2;
    vec.insert(it, make_tuple(3, 26));

    get<1>(*it) += 1;

    cout << " [ ITEMS ]: ";
    for (it = vec.begin(); it != vec.end(); ++it)
        cout << " <L: " << get<0>(*it) << ", R: " << get<1>(*it) << ">";
    cout << "\n";

    return 0;
}
